内蒙古草地光谱特征分析

Spectral Properties Analysis of Grassland in Inner Mongolia

通过野外定点光谱采样,对线叶菊、羊草等几种常见的草甸草原类型进行光谱特征分析和种类识别,并分析了不同退化梯度草原的光谱特征。结果表明通过高光谱可以很好的体现不同草地类型、不同植物光谱差异特征。羊草在可见光比针茅的反射率大,而一阶导数,针茅的峰值比羊草大,红边位置与红边面积有所不同,且存在BEP"红移"。并发现在可见光区域重度退化草原的光谱反射率大于轻度退化的光谱反射率,而在近红外要小于轻度退化的光谱反射率。

Analysis of spectral characteristics and species identification by field sentinel spectral sampling, Filifoliumsibiri- cum, L. chinensis several common types of meadow steppe and spectral signatures of different degradaded grassland. The re- sults show that hyperspectral well represented different grass types, different plant spectral differences characteristics. The reflectivity of Stipa larger than L. chinensis in the visible light, while the first derivative, The peak value of Stipa is larger than L. chinensis,red edge position and red edge area are differenthere and the presence of the BEP ＂redshift＂. The spec- tral reflectance of severely degraded grassland larger than the slight degradation in the visible light region , while in the near infrared is less than the spectral reflectance of light degradation.